18785871

素因数分解:

$3^3\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{179}}^1$

素因数の和:237

約数の個数: 48

約数和(自身を含む): 31622400

約数和(自身を除く): 12836529

約数列:

[1, 3, 9, 13, 23, 27, 39, 69, 117, 169, 179, 207, 299, 351, 507, 537, 621, 897, 1521, 1611, 2327, 2691, 3887, 4117, 4563, 4833, 6981, 8073, 11661, 12351, 20943, 30251, 34983, 37053, 53521, 62829, 90753, 104949, 111159, 160563, 272259, 481689, 695773, 816777, 1445067, 2087319, 6261957, 18785871]

約数ペア:

[(1, 18785871), (3, 6261957), (9, 2087319), (13, 1445067), (23, 816777), (27, 695773), (39, 481689), (69, 272259), (117, 160563), (169, 111159), (179, 104949), (207, 90753), (299, 62829), (351, 53521), (507, 37053), (537, 34983), (621, 30251), (897, 20943), (1521, 12351), (1611, 11661), (2327, 8073), (2691, 6981), (3887, 4833), (4117, 4563)]